This is the all new Mainstays Bed Risers with USB Ports! This product in particular was designed by Mainstays to give a new styled bed risers with more functionality as the rest. On one of the Bed Risers, there is 2 USB ports that can charge a range of products such as a phone, iPod, or anything else that uses a USB Cable to charge. For those who would like to charge or power something with a regular plug in, look no further. Not only does it contain 2 USB ports, but it also has two 3-pronged plug ins that you can use for multiple items like a lamp or to charge a computer. This set of four bed risers feature two USB ports and two 3-prong power outlets. These risers add five inches to your bed height, allowing you extra space for valuable storage. Be a step ahead and try Mainstays all new Bed Risers with USB Ports!